21235550347 has 8 divisors (see below), whose sum is σ = 23175692352. Its totient is φ = 19297014600.

The previous prime is 21235550339. The next prime is 21235550419. The reversal of 21235550347 is 74305553212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21235550347 - 2³ = 21235550339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21235550047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373833 + ... + 426874.

It is an arithmetic number, because the mean of its divisors is an integer number (2896961544).

Almost surely, 2^21235550347 is an apocalyptic number.

21235550347 is a deficient number, since it is larger than the sum of its proper divisors (1940142005).

21235550347 is a wasteful number, since it uses less digits than its factorization.

21235550347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803129.

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 21235550347 in words is "twenty-one billion, two hundred thirty-five million, five hundred fifty thousand, three hundred forty-seven".